The LOX ES20 Series high security Electric Door Strikes are one of the most successful commercial Electric Strike products in Australia. It is manufactured from stainless steel, accepts D.C. Voltages from 10 to 30 VDC and is site interchangeable from Fail-Secure to Fail Safe (Power to Release to Power to Lock) by only using a small screw-driver. The ES20-EL50 50mm Extension Lip suits the ES20 and ES20M Electric Strikes.